The detective leading the hunt for Mr Montague's killer said new leads would be featured in a TV reconstruction tonight.

Det Insp Clive Mansell, who is running the investigation, said: "The anniversary of Joe's death is approaching and this is a critical point in the investigation to seize the opportunity that Crimewatch presents."

He said much of what was known about Mr Montague's death would feature in the programme, and urged the people of Coventry to watch it.

He added: "The broadcast will include the latest developments in the investigation and material that is not in the public domain.

"It is that sort of material that will prompt somebody somewhere to make a connection between what they know and this investigation."

It is believed new forensic and photographic evidence will be broadcast.

Police said last year that the gunman struck as 64-year-old Mr Montague parked his Ford Focus. He was pronounced dead at the scene after being killed by gunshot wounds to his head - a killing detectives said bore the hallmarks of a "practised and planned" killing by a hit man.

He had been at the Midlands Area welterweight title fight at Coventry's Centre AT7 in Courthouse Green hours before his death.

Anyone with any information is asked to ring the Operation Penstock incident room on 024 7653 9160, or the anonymous Crimestoppers line on 0800 555 111. Crimewatch is on BBC1 at 9pm tonight.